I suggest that women only do exercises that have a clear mesorah in Yiddishkeit. Sarah Imaeinu for sure did not play tennis or basketball, take zumba or spin classes, go swimming, do aerobics or jumping jacks or other goyish who-knows-what.
She lived to 127 years old just by doing what a proper Jewish woman needs to do. She cooked and cleaned and was a helpmate to her husband. What Jewish woman needs more than that?